.shelf_head {
    width: 94%;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    .head_book {
        display: inline-block;
        font-size: 24px;
        line-height: 50px;
    }
    .head_icon {
        width: 36%;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
}